J. Duncan Davidson, holder of the National Diploma in Agriculture (NDA) and an associate of the Royal College of Science of Dublin, Ireland, held the post of biologist at the Cedara School of Agriculture, near Pietermaritzburg, in 1909. During that year he published two articles in the Natal Agricultural Journal, "Breeding and the problem of heredity" (Vol. 12, pp. 405-407) and "A tree strangling fungus" (Vol. 12, p. 617). That same year he was appointed as warden and lecturer in agriculture at the School of Agriculture, Potchefstroom.
He is probably the same person as the J.D. Davidson who published an article on 'Manures and manuring' in The Agricultural Journal of British East Africa (Vol. 2(1-2), pp. 435-438) in 1909.
